Power controller for microwave magnetron

Details Power controller for microwave magnetron Power controller for microwave magnetron

1975-07-24

1977-01-04

Goldberg, Gerald

Electric heating

Metal heating

Of cylinders

323 8, 323 24, 323 36, 331 86, H05B 906

Patent

active

040015378

ABSTRACT:
A microwave magnetron operating circuit includes a high leakage reactance transformer having a secondary winding a capacitor connected in series with the secondary winding and means connecting the series combination of capacitor and secondary winding across heater cathode and anode terminals of a magnetron. A controlled semi-conductor switch such as a triac is connected electrically in shunt of the magnetron. Control means are provided to operate the triac to its current conducting state so as to conduct current in shunt of the magnetron. The control means includes a positionable control member, accessible to the user, for varying the time at which the controlled semi-conductor device is placed in its electrically conductive state so as to permit the user to adjust or set the power supplied to the magnetron to various different power levels.

REFERENCES:
patent: 3396342 (1968-08-01), Feinberg
patent: 3543141 (1970-11-01), Lawson
patent: 3651371 (1972-03-01), Tingley
patent: 3684978 (1972-08-01), Otaguro
patent: 3729651 (1973-04-01), Fricker et al.
patent: 3760291 (1973-09-01), Levinson
patent: 3793531 (1974-02-01), Ferrigno
patent: 3872277 (1975-03-01), Niu
patent: 3898553 (1975-08-01), Boggett
Appliance, Feb. 1975, "Designed for Slow Cooking at Microwave Speed," by James Stevens.

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